Motor drive for talking machines



Aug. 21, 1923. V 1,465,172

L. P. VALIQUET MOTOR DRIVE FOR TALKING MACHINES Filed Marjch 3, 1921 3 Sheets-Sheet 1 Aug. 21, 1'923.

1,465,772 L. P. VALIQUET MOTOR DRIVE FOR TALKING MACHINES Filed March 5, 1921 3 Sheets-Shoot 2 Aug. 2l, 1923. 1,465,772-

L. P. VALIQUET MOTOR DRIVE FOR TALKING MACHINES Filed March 5. 1921 3 Sheets-Sheet :3

WAY/z (D15 Patented Aug. 21, 1923.

instan UMT'D sTlir-esy PATE'T'FFICE.

LOUIS I. 1vnIacuer, ojroHIcAco, ILLINOIS.

Moron DRIVE 'non TALKING MACHINES.

Application nledrlaieh `3, 1921. serial No. 445,404?.

Y Be it known that l, Louis P. VALIQpnT; a citizen of lthe United States, residin* at Chicago, in thecounty of Cook andv tate of Illinois, have invented certain newA and useful 1m rovements VinlVlotor' Drives for Talking achines, of which the following is a s ecitication. Y

4ly invention provides an improved motor-drive for talking machines and, in some of its features, has particularlyto do With constructions4 wherein an electric -motor is used as'the source of power. It' is understoodl that an electric motor mayt be ein-i ployed Vto drive the shaft for the record- `l table, or the table itself, of ,a talking'mamere substitution of a small eiectric motor chine, and that the table-rotation mustl be speed-governed and Vthat the operation ot' the machine must be readily controllable to start or" stop it. But in attempting 'any for theI customary spring motor of Ia' discrecord talking machine onej encounters. many corelated "diiculties and problems that have not heretofore been successfully I solved;

Thegeneral object of my invention-is to provide a commercially satisfactory, eiiicient, durable and inexpensive construction utilizing an electric motor as a' power source and coordinating and improving the features of speed-governing and of starting and stoppingncontrol in such marineros to insure fully-'satisfactory operation of the' mechanism and itsV substantial Nt'dnlprooff' ness or protectionrfrom damage by careless operation.

Among the more detailed objects of `my invention are, vto provides mounting and:

co-relation of the motor, gearing elements,

regulating and' governing parts, anditurn' table that will be atonce functionallyriidequateV 'mechanically f economical] I for quantity production; to providehiglily 'ef-,f .ficient governing'means for close, delicate and subst-antialiy instantaneous control` 'of'V the turntable speed and its lmaintenance at: the selected speed despite current fluctuate; tions tending to atleet it; to tacilitatefan maintain vaccurate factory adjustr'nent,ofi

users readjustment, between the speed-V governing handle and the mechanical governor-parts to insure performance substan` tially'accordant With the speed-lindigatlfn'y scale; 'and Yto give thefrequisite rangen speedvariation;l to associate the V'motor starting'switch and tabiebrake mechanisms for: proper related lfunctioning and also to relate t 'e table and gearing so that tablebralieQailure fniay not endanger the gear Ingrand in other and further particulars to improve generally and in detail the associ ated mechanisms of the drive.

'In' theldiawings wherein I have illustrated a specific embodiment of my invention or'purposes of full disclosure, Fig. 1 is a plan View oit the Vdrive equipment, with the record Vtable removed, and with its tripmechanism associated Ywith the tone-arm; F'igLfZis an end elevation of the construction shown f Fig. 1; with the record table in place; Fig. 3V is ,a front elevation with parts broken away; Fig. 4 is an inverted plan vievvg'Fig. 5 is n section on line 5-5 of Fig. 4; Fig. 6 is a detached detail of governor appliances; Fig. 7 is a section on line 7--7 of Fig. 6; Fig. 8 is a section on line 8--8 of Fig. 6, and Fig. 9 is a sectional detail of the table-mounting.

In 'general 'it will at once be apparent from the drawings Ythat on the trame or bed-plate v10I all ofV Vthe mechanisms are mounted; that the suspended motor ll.,`

through horizontal shaft 12, worm-drives the' vertical Vshaft 13 for the record-table 1i abovethe plate; thatV this vertical tableshaft 13 Worm-drives a horizontal governor shaft 15 through Whose governor speedcontrol is effected Aaccording to the setting of the governor-'handle 16, above the plate; thatthebraking or release of the turntable effected by brakesstructure 17 the release i latch y18 ofl Whichfis subject to semi-autu- Iriatie controlV from the tone-arm 19 through a trip mechanism 20, and that starting or stopping of the electric motor is controlled bye switch 21 below the plate.

The motor 11, designed for a normal speed of'say 1080 R. IKM., ismounted directly on the underside (it the plate l() and communicatesits'drive'directly to shaft 12 through the somewhat ileXible ccuplin 12 of known type shaftlQ `finding` thrust caring in the endV ing 22 and support in the bearing sleeves il?) kprovided in theV hollow gear-casing 2l that depends from` andis screwed to the bed plate 10;. lhe'table-sliat 13, stepped in this gear'casi'ngis' wormdriven from shaft 12, the latterhaving amaChne-thread Worm 25 cut therein jand theE shaft 13 having pinned to it acrr'esponiii'ng machine-thread WormllO driven from the table shaft 13,1r1aypreferably have a higher speedn than Athe niet@ shaft which parallels itand therefore is preferably driven from a second Worm wheel 2T mounted above the first and l'ra'r-iingV a different number of teeth. This Wheel coacts with the worin 28 out in the shaft 15 that linde bearing in the lugsQQ, 29,.of the frame, and for requisite sensitiveness to control this latter worm is of the under-cuttooth variety. Shaft carries the governor structure 3G of linown Vtype that comprises a friction disc 31 slidable on Vtheshaft, a Collar ixed on the shaftfand the usual ball-laden governor springs 33 connecting the collar and the dise-heb. .rgovernor to be operated by governor .handle 16, cooperares with the disc 31, but preferably there is eorelated with this brake another one to act upon the motor shaft 12. Thus, to the motor shaft 12 is a disc E12, preferably of somewhat larger diameter than disc 31 'and preferably lying in the same or a parallel plane, and thc two friction pads v34, 34 for cooperation with the niargins of these discs,

respectively, are mounted on opposite ends of a rocker arni 35 that is pivoted as at 35 to a governor-l)rake-lever 3G Whichin turn is piroted at Si' to the plate *1Q preferably near the vertical )lane thron h Shaft12 and which is normally retractec as by spring EL letwcen level' 3G and rocker arm 35 a light spring 32) is connected, tending to hold the pad 3:1A on the front end of the rocker away from the governor disc 31 and lightl7 to touch the pad 3l upon the motor sha t disc 32 even when the brake-.lever is retracted. Thus it is insured that fthe governor disc 3141s left entirely free, When the niaehine is idle, 1whatever maybe the position of the governor-handle 16, insuring that the motor may start with facility; Whereas ev'en the lightest pressure on the :governor disc (since the moti-ve power is transmitted thereto throughtwo wenns) tends detrimentally to prevent prompt starting-o1' pick-epi of the motor. A light touch of the pad 34 on the motor shaft disc has no detrimental effect on account of the direct ela-bve thereto, and in practice l find the motor `t0n Start perfectly with the construction stated. When the governor shaft seeks to attain full spo-ed. however. and the friction pad 34 cooperates with its disc 31, the .pressnre engendered acts on both of the discs, through the arrangement of the rocker m1113577, taking strani ell' of the governor, tendin directly to check the motor shaft,i and giving such delicacy of control andsuch promptness of response to move-nient of thehndle 16 as to produce almost instantaneous rellection of the handle-movements 11i there eed of the table. In practice relatively Vs ort Aadjustments of the handle 16, melde irhi-lea record isrnnning, produce such quick response that to the anditorithcre isrlittleror none of the cnstemafry slur between Qpitcls-o themiusie or voice that ordinarily attend speed adjust-- nient While a talking machine is running.

@lfeonrse the governor-handle 16 has crank connection beneath the plate 10 with the 'governor lever 36, and the handle 16 eooperates with a customary scale l() that may be marked with speed-indicating graduations 40. lt is important that the connec-` tion between handleV 16 and the governor nischen-ism be so establishelraaid sop-readily adjastablc, that Scale-indicated table-speed (particularly around the normal R. I). M. speed) and the actual performance of table sha-ll tal-ly. I prefer so to gear the vertical shaft to the motor shaft so tha-tat the normal Speed of the former e., 80 R. P. M.) the rnotor will be running at say l0 revolutions below its ratedispeed, giving a leeway to take care of voltage-drop in the supply line and I prefer that under these conditions the gearing sl-ialldrive thc governor shaft et about 1250 R. P. M. In setting, or readjusting forthese preferred conditions, the handle 16 is arbitrarily set at 80, the governor lever 36 is hand-moved to establish the requisite table-shaft speed (per a speed.Y indicator `temporarily applied thereto) and then an adjustable element of operative-connection between the two levers is lined in .its proper adjustment. For this connection the adjustable link 41 is employed, made in two overlapping flat sections, one ivoted Ato a crank 4-2 of the handle 16 and t e other pivoted to the end of governor lever 36, the two overlapped sections being adjustably connected by the screw and slot arra ement 43 and-the link being preferably guided between rails 44 formed on the underside of the plate. Y

The table 14 is preferably quite a heavyV metal plate, for flywheel effect,V and its mounting, the provision for its braking and the ico-relation of the brake mechanism with the motor switch, are preferably organize-d in ra manner that is particularly advantagec-nsin connection with the provision of an electric motor as the prime mover andA thea-rrangement of the sensrtive and ado-x qnate governingV mechanism above described. The table-brake 17 above the plate Y1t),

may be the usual bell-crank lever with a linger-piece 45 and a brake-pad arm 4G to work anst the periphery of the table, the hub-shoulder 47 eoacting with the latch member 18 under the `ell'ectf of spring 4S in known fashion and the latch leverbeing conveniently subject to semi-automaticr VEcontrol by the trip arm 20. the adjustable i 49 whereof coacts with the pin 50 plate 10 the movable contact arm of the prima on the swinging tone arin 19, also 1n kno-Wn*V ini mtqrn Switch .rlaandes remanded: tekenen thei-.rnetolnswitchabeferee the braketaseainf pedianrbtwaebfliake theftabmleefegenles, ing thmmetor; Switch; .veetvantageusln insuresithat alle@ metenseay mit? receive .cate lentifuetl Etta liable dal te etten: the -itablw haah been'@v @bestede at makes possible the careless manuale(jpense` tierratitwhreke leves it@ lewe the table free from braking effect after the motor circuit has been opened and the motor stopped. Therefore, and for other advantages, the table 14 is rotatively loose on the shaft 13, and only; frictionally carried in rotation therewith. In this connection it will be understood that the simple machine-toothed worm and gear connection Q-Qtbetween the motor shaft and the table shaft, while effectively giving best driving power, is practically incapable of transmitting motion from the wheel to the worm and therefore, were the table 14 fixed to shaft 13 heavy strain would be thrown on the worm gearing were the table allowed to travel unbraked after the motor stops. In thel specific construction shown the table shaft 13 has secured thereto near its upper end a cupped carrier or support 53 on the annular horizontal rim of which the table 14 normally bears, the extremity of the shaft extending loosely into the downwardly protruding hub 14 of the table, which is re4 cessed from above as at 54 to receive the spring 55, which, in turn is maintained in Contact with the base of the recess by the bottom flange of the record-shank 13 screwed ,onto the end of shaft 13, such spring insuring maintenance of an adequate frictional connection for normal rotation of the table synchronously with the table shaft. Thus if one oscillates the table by hand; tries to turn it backward; or leaves it free from brake-restraint while stopping the motor, no damaging strains are thro-wn on the drive mechanism because of the frictional connection.

It will be noted that not only is the construction above described advantageous in its corelation of functions to secure best performance under the conditions imposed by electric motor drive, but that in the mechanism structure, the mounting, and the interconnection of the parts, advantageous simplicity, manufacturing economy, smallness of size, and disposition of the parts for accessibility and lubrication are of distinct merit.

I claim:

1. In a machine of the character described, the combination of a table shaft, a drive shaft and a governor shaft, provision for worm-driving the table shaft from the driving shaft and the governor shaft from the table shaft, a governor on the governor shaft having a brake-receptive element, a

brakefneceptive elemeteomthendrizve shaftt, ahd Jspeaking,overnin'gfvlnzalsse i means; .comet-fhg with` both Vsaid:trairereceptive `elementen f2s dir, of theeharaa'ler Edescnibed, thegeinbination of autablenshaft; atdrve shaft f ,andi 1a governort .sha-fan prbzvisioi fait wermrdriiving tiie natste; shaftifrcmztlne daiva ing shaft and the governor shaftefremnthe tebeeeleefty eaffgevemhri @mths gevielnOr Shaft having a brake-receptive. element, a bralre-receptive element on the drive shaft, and speed-governing-brake means coacting with both said brakereceptive means, comprising a shiftable lever and a rocker arm pivoted to said lever and having on opposite sides of the pivot two brake-pads for respective cooperation with said two brake-receptive means.

3. In a drive of the character described, the combination of a drive shaft, having a brake-receptive disc, a governor shaft having a. governor thereon and a lgovernor-shiftablc brake-disc, a table shaft and provision for worm-driving said table shaft from the drive shaft and worm-driving the governor shaft from the table shaft, a pivoted .main governor lever, a rocker lever pivoted on said main lever and bearing on opposite arms brake pads for the two respective brake-discs, and yielding means normally tending to tilt said rocker lever away from the brake dise of the governor.

4. In a drive of the character described, the combination of an electric motor, a sha-ft directly driven thereby bearing a brakemember rotatable therewith, a table shaft, worm gearing having machine threads betweenthe drive shaft and the table shaft, a governor shaft having an undercut worm, geared to the main shaft, said shaft carrying a governor having a movable brake-receptive surface, a rocker lever having pads for respective coaction with said two brake surfaces of the governor and the drive shaft, a main governor lever pivotally carryingr said rocker lever, a spring interposed between said two levers tending to rock said rocker lever to effect brake contact with the drive shaft brake surface and out of contact with the governor brake surface, and a handle for moving the main governor lever.

5. In a drive of the character described, the combination of an electric motor` a shaft directly driven thereby bearing a brake-member rotatable therewith, a table shaft, worm gearing having machine threads between the drive shaft and the table shaft, a governor shaft having an undercut worm, geared to the main shaft, said shaft carrying a governor having a movable brake-receptive surface, a rocker lever having pads for respective coaction with said two brake surfaces of the governor and the drive shaft, a main governor lever pivotally carrying said rocker lever, a spring interposed between said two levas wading to rock said mker Vever to Egea, brake Contact; with 'the drive shaft brake surfaoe 'and out Vnf contact with the govennur brake alu-fana, and YAmamas for mov- S ing he main `lgfovernorr lever, comprising a hahdl 11nd quick-adjustment. Erik-Bonnets tion'bedzween the 'hwntle 'andfthe main gmV emozilever. A 1

6. in a till-ive bf'the character-escriife a base, tae'shafft, means for driving the tagbe shaft, a governor Yacting on the table shaft, V governor 110ml', arhandlever coopera ing with a soae, and aperaave connections between Sadhand kever 'eind-governor Vlever comprising s. two-pnt Elink and qunbsdiustmnt Aconnection be'riwiiveen the parte l@nf said dink. Y

LOUIS VALIQUET. 

